Take the following code snippet

class Missile:
    instances = []

    def __init__(self):
        Missile.instances.append(self)

Now take the code:

class Hero():
    ...
    def fire(self):
        Missile()

When the hero fires, a missile needs to be created and appended to the main list. Thus the hero object needs to reference the list when it fires. Here are a few solutions, although I'm sure there are others:

• Make the list a global,
• Use a class variable (as above), or
• Have the hero object hold a reference to the list.

I didn't post this on gamedev because my question is actually more general: Is the previous code considered okay? Given a situation like this, is there a more Pythonic solution?